alpine ai-net cable question

hey there everyone i have a Alpine 7977 with ai-net cable. my g/f just bought me a mp3 player for my b-day. i know you can buy a adapter from ai-net to rca. i was wondering if anyone here knew the wiring color combo so i can just cut and soilder a head phone jack to it.my head unit is old enough i doubt i could sell it for much and have no intentions on doing really so i dont care to chop into it. if anyone could help id appreciate it.
Thanks in advance
danny